Final answer:
A protein is a polymer of amino acids. Proteins are made up of nitrogen-containing monomers called amino acids, which are connected by peptide bonds to form long chains.
Step-by-step explanation:
A protein is a polymer of amino acids. Proteins are made up of nitrogen-containing monomers called amino acids, which are linked together by peptide bonds to form long chains. These chains of amino acids make up the structure of proteins and determine their unique shape and function.